In 1933, an unfinished manuscript surfaced among the papers of a forgotten antiquarian in Arkham, Massachusetts. Its pages spoke of abandoned churches, of sleepless vigils before darkened glass, and of reflections that did not entirely obey their owners. Nearly a century later, a quiet English lecturer uncovers the fragments and begins to assemble what was left unfinished - only to discover that some texts do not conclude when they are closed. The Testament of Glass gathers documents spanning generations, bound by a single, inescapable premise: Not all things watch from above. Some wait in the act of being seen.